Science

Our understanding of the true nature of the cosmos relies on measurements of its expansion, but cosmologists have been arguing back and forth about it for more than 100 years

A mysterious cloud of ultra-hot dust around Kappa Tucanae A may finally have an explanation: a hidden companion star. The star’s extreme orbit carries it straight through the dust zone, strongly suggesting it plays a key role in keeping the dust alive. This finding could help astronomers untangle one of the biggest challenges in imaging Earth-like exoplanets. It also opens the door to discovering similar hidden companions around other stars.

People think online platforms are overflowing with toxic and misleading content, but the reality is far calmer. A small group of highly active users creates most of the harm, while the majority remain relatively civil. Still, many Americans assume the worst about each other because of this imbalance. Correcting that belief can noticeably improve how people feel about society.

When we gaze up at the night sky, we assume that what we're seeing is a representative population of similar stars at similar distances. But it's not. The stars we see are a mixture of massive and small, distant and near. In fact, we can't even see our closest neighbour, Proxima Centauri. We see these stars because they have large observational signals, and that illustrates one of the problems in astronomy.

The newish government of New Zealand is finally seeing the light, and has mandated that every one of the country’s eight universities (all government funded) must at some point adopt a policy of freedom of speech and institutional neutrality (the latter resembles Chicago’s Kalven Report).

The University of Auckland, the country’s flagship university and its best and most important one, issued a public announcement after adopting this policy, which happened this month via the University’s council. The PR announcement is here, and reads like this:

Waipapa Taumata Rau, University of Auckland has formally adopted its Freedom of Expression Statement, following approval by the University Council at its meeting on 10 December.

The statement outlines the University’s commitment to protecting and promoting freedom of expression and academic freedom, and reaffirms its role as a critic and conscience of society. It sets expectations for lawful, constructive and civil debate across the University and outlines the principle of institutional neutrality, which helps create an environment where conversations can freely take place.

Vice-Chancellor Professor Dawn Freshwater says the statement reflects extensive engagement and consultation with the University community.

“Freedom of expression and academic freedom are foundational to our role as a university. This statement provides clarity about our responsibilities and expectations as a community, and reaffirms our commitment to fostering an environment where diverse viewpoints can be expressed lawfully and constructively.”

The statement’s development involved an extended period of careful discussion and refinement through both a Senate working group and the Vice-Chancellor’s Advisory Group.

Professor Cathy Stinear, Pro Vice-Chancellor Equity and a member of the Advisory Group, says the work was challenging but rewarding for those involved.

“I’m particularly proud of the way we respectfully debated the issues and carefully balanced the tensions between free expression and caring for the diverse communities that make up our University.”

istinguished Professor Sir Peter Hunter, who chaired the Senate working group and led the development of the statement with support from Professor Nikki Harré and the Vice-Chancellor’s Advisory Group on Freedom of Expression, says the process was shaped by robust feedback.

“In my view, the process of finding common ground between many different points of view has been as important as the statement itself. Universities must demonstrate the ability to freely debate contentious issues.

“I would like to thank the members of the groups involved and the near unanimous endorsement from Senate.”

And below is the official statement itself. Notice the critical neutrality phrase, “The University will not take public positions on matters that do not directly concern university roles, functions or duties.”  That’s very similar to the Kalven report. Further, the last sentence justifies institutional neutrality as a way to avoid chilling speech—exactly the same rational that the University of Chicago has.

I’ve also obtained a copy of the Senate’s minutes that resulted in this outcome, and here’s a brief excerpt:

The majority of Senate voted in favour of the motion with only a few votes against and abstentions recorded.

The motion was declared carried.

Professor Hunter expressed appreciation for the extensive work undertaken by the Working and Advisory Groups and all contributors throughout the consultation process. He observed that the process had demonstrated the value of constructive debate and the willingness of participants to listen and adapt their views. He acknowledged all involved in the process and specifically Professors Stinear and Clements and encouraged commitment to ongoing dialogue and improvement.

The Vice-Chancellor concluded by encouraging Senate to continue fostering an environment in which open and respectful debate could take place and the voice of academic excellence could be heard. She recommended that Senate would continue to provide leadership in this regard.

Note that Sir Peter Hunter, the head of the working group, thanks not only Professor Cathy Stinear for help, but also Kendall Clements, one of the demonized signers of the infamous “Listener Letter” arguing why indigenous “ways of knowing” are not the same as modern science.  I find it interesting and heartening that all three of these people are in STEM: Hunter is a bioengineer, Stinear a neuroscientist, and Clements is an evolutionary biologist and ichthyologist. And note that there was very little dissent about passing this.  I suspect, though I don’t know, that the administration of Auckland Uni had put this on the back burner for years.  I find it ironic as well that the Vice-Chancellor, Dawn Dishwater, now says she’s in favor of this policy when for years she has put roadblocks on freedom of speech. (Remember when she promised an open discussion of indigenous versus modern science and then it never took place?)

Now why is this important?  Because it codifies what the rules are in the country’s most notable university, and one hopes that other universities will follow suit. They will more or less have to in principle, and draft their own statements, but what happens in practice in New Zealand could be quite different.  The country and its universities are rife with intimidation and peer pressure, and, as I’ve written about repeatedly, there is a huge amount of self-censorship. Nobody dares criticize indigenous “knowledge” nor even arrant preferences given to indigenous people. If you criticize any of that, you’re likely to lose your job. This kind of pressure has turned the 1840 Treaty of Waitangi into a sacred document, in effect the Constitution of New Zealand, despite the fact that “Te Tiriti,” as it’s called, is both ambiguous and wasn’t even signed by all the indigenous leaders. The Treaty has been interpreted as saying that indigenous people get half of everything, including presence of indigenous “ways of knowing”—which include superstition, legends, morality, and rules for living)—in science classes

 

This intimidation is especially notable in New Zealand’s universities.  The hope of those who pushed this policy is that the University of Auckland will be a model for the country’s other schools. But the policies outlined above will face stiff opposition—opposition from an entrnched academic and ideological culture based on identity politics. Fingers crossed! At least it looks like a step forward.

The Large-Scale Structure of the Universe features massive filaments where galaxy clusters and superclusters reside. In between these filaments are cosmic voids, vast regions that are nearly empty. The Nancy Grace Roman will map and study 80,000 of these voids to place constraints on Dark Energy drives the expansion of the Universe.

Today, courtesy of Rik Gern, we once again enter the mysterious world of fungi. Rik’s captions and IDs are indented, and you can enlarge his photos by clicking on them.

Here is the second batch of photos of Pinewood gingertail (Xeromphalina campanella) mushrooms from Wisconsin’s northwoods.  I tried to focus on portraits of individual mushrooms in this series.

This picture of the gills on the underside of the cap was taken using natural light.

The following two shots utilized a flash. (3-4) I like how they reveal more detail, and the flash sure makes the exposure easier, but something about the lighting doesn’t feel quite right.

This picture was a lot harder to process, but the natural light made it more satisfying:

The last several pictures are all of the same cluster of mushrooms. There was something about this grouping that seemed majestic and it was fun to try to give each shot a different feel:

This is a reminder to send in your photo of cats with a Christmas theme (or Hanukkah theme, as we now have four Jewish cats).  The instructions are here and we have acquired the requisite 20 photos for posting. (Note: the cats below, a pair of Christmas-y Pallas’s cats (Otocolobus manul)), is AI generated;  we don’t want those!)

Remember, one photo per submission, please! I’ll make the Deadline 9 a.m. December 24; the day before Koynezaa.

Ramanujan’s elegant formulas for calculating pi, developed more than a century ago, have unexpectedly resurfaced at the heart of modern physics. Researchers at IISc discovered that the same mathematical structures behind these formulas also describe real-world phenomena like turbulence, percolation, and even black holes. What once seemed like pure mathematics now appears deeply intertwined with the physical laws governing the universe.

Ramanujan’s elegant formulas for calculating pi, developed more than a century ago, have unexpectedly resurfaced at the heart of modern physics. Researchers at IISc discovered that the same mathematical structures behind these formulas also describe real-world phenomena like turbulence, percolation, and even black holes. What once seemed like pure mathematics now appears deeply intertwined with the physical laws governing the universe.

Physicists have found a clever way to detect the elusive Unruh effect without extreme accelerations. By using atoms that emit light cooperatively between mirrors, acceleration subtly shifts when a powerful light burst appears. That early flash acts like a timestamped signature of the effect. The method could make once-theoretical physics experimentally reachable.

Physicists have found a clever way to detect the elusive Unruh effect without extreme accelerations. By using atoms that emit light cooperatively between mirrors, acceleration subtly shifts when a powerful light burst appears. That early flash acts like a timestamped signature of the effect. The method could make once-theoretical physics experimentally reachable.

If you read enough articles about planets in binary star systems, you’ll realize almost all of them make some sort of reference to Tatooine, the fictional home of Luke Skywalker (and Darth Vader) in the Star War saga. Since that obligatory reference is now out of the way, we can talk about the new “super-Jupiter” that researchers from two separate research teams, including one at Northwestern University and one at the University of Exeter, simultaneously found in old data from the Gemini Planet Imager (GPI).

Satellites in orbit would begin to collide in a matter of days if they lost manoeuvrability during a solar storm or other outage

Now I got a job, but it don’t payI need health insurance, I need somewhere to stayBut without all of these things I can doBut without vaccines, I won’t make it throughBut you don’t understand my point of viewI suppose there’s nothing I can do I have been on a bit of a Clash binge of late. Truly one of the great […]

The post Terrain in Vain first appeared on Science-Based Medicine.

A newly developed AI can predict which diseases specific genetic mutations are likely to cause, not just whether they are harmful. The breakthrough could speed up diagnoses and open new paths for personalized treatment.

The rings of Saturn are normally thought to be flat, but measurements by the Cassini spacecraft show that some of their particles fly hundreds of thousands of kilometres above and below the thin main discs

Professional footballer players who became injured while on their period took longer to recover than when injuries occurred at other times of their menstrual cycle

The Shenzhou-21 crew on board China's orbiting space station completed its first extravehicular activities on Tuesday, Dec. 9th, during which they validated the new EVA spacesuits.

A team of researchers from the University of Zurich and the NCCR PlanetS is challenging our understanding of the interior of the Solar System's planets. The composition of Uranus and Neptune, the two outermost planets, might be more rocky and less icy than previously thought.